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    <h1>
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        <a href="../.." >其他常见事件</a>
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                                <section class="normal markdown-section">
                                
                                <h1 id="&#x5176;&#x4ED6;&#x5E38;&#x89C1;&#x4E8B;&#x4EF6;">&#x5176;&#x4ED6;&#x5E38;&#x89C1;&#x4E8B;&#x4EF6;</h1>
<h2 id="&#x8D44;&#x6E90;&#x4E8B;&#x4EF6;">&#x8D44;&#x6E90;&#x4E8B;&#x4EF6;</h2>
<h3 id="beforeunload-&#x4E8B;&#x4EF6;">beforeunload &#x4E8B;&#x4EF6;</h3>
<p><code>beforeunload</code>&#x4E8B;&#x4EF6;&#x5728;&#x7A97;&#x53E3;&#x3001;&#x6587;&#x6863;&#x3001;&#x5404;&#x79CD;&#x8D44;&#x6E90;&#x5C06;&#x8981;&#x5378;&#x8F7D;&#x524D;&#x89E6;&#x53D1;&#x3002;&#x5B83;&#x53EF;&#x4EE5;&#x7528;&#x6765;&#x9632;&#x6B62;&#x7528;&#x6237;&#x4E0D;&#x5C0F;&#x5FC3;&#x5378;&#x8F7D;&#x8D44;&#x6E90;&#x3002;</p>
<p>&#x5982;&#x679C;&#x8BE5;&#x4E8B;&#x4EF6;&#x5BF9;&#x8C61;&#x7684;<code>returnValue</code>&#x5C5E;&#x6027;&#x662F;&#x4E00;&#x4E2A;&#x975E;&#x7A7A;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x90A3;&#x4E48;&#x6D4F;&#x89C8;&#x5668;&#x5C31;&#x4F1A;&#x5F39;&#x51FA;&#x4E00;&#x4E2A;&#x5BF9;&#x8BDD;&#x6846;&#xFF0C;&#x8BE2;&#x95EE;&#x7528;&#x6237;&#x662F;&#x5426;&#x8981;&#x5378;&#x8F7D;&#x8BE5;&#x8D44;&#x6E90;&#x3002;&#x4F46;&#x662F;&#xFF0C;&#x7528;&#x6237;&#x6307;&#x5B9A;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x53EF;&#x80FD;&#x65E0;&#x6CD5;&#x663E;&#x793A;&#xFF0C;&#x6D4F;&#x89C8;&#x5668;&#x4F1A;&#x5C55;&#x793A;&#x9884;&#x5B9A;&#x4E49;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x3002;&#x5982;&#x679C;&#x7528;&#x6237;&#x70B9;&#x51FB;&#x201C;&#x53D6;&#x6D88;&#x201D;&#x6309;&#x94AE;&#xFF0C;&#x8D44;&#x6E90;&#x5C31;&#x4E0D;&#x4F1A;&#x5378;&#x8F7D;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;beforeunload&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">event</span>) </span>{
  event.returnValue = <span class="hljs-string">&apos;&#x4F60;&#x786E;&#x5B9A;&#x79BB;&#x5F00;&#x5417;&#xFF1F;&apos;</span>;
});
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x7528;&#x6237;&#x5982;&#x679C;&#x5173;&#x95ED;&#x7A97;&#x53E3;&#xFF0C;&#x6D4F;&#x89C8;&#x5668;&#x4F1A;&#x5F39;&#x51FA;&#x4E00;&#x4E2A;&#x7A97;&#x53E3;&#xFF0C;&#x8981;&#x6C42;&#x7528;&#x6237;&#x786E;&#x8BA4;&#x3002;</p>
<p>&#x6D4F;&#x89C8;&#x5668;&#x5BF9;&#x8FD9;&#x4E2A;&#x4E8B;&#x4EF6;&#x7684;&#x884C;&#x4E3A;&#x5F88;&#x4E0D;&#x4E00;&#x81F4;&#xFF0C;&#x6709;&#x7684;&#x6D4F;&#x89C8;&#x5668;&#x8C03;&#x7528;<code>event.preventDefault()</code>&#xFF0C;&#x4E5F;&#x4F1A;&#x5F39;&#x51FA;&#x5BF9;&#x8BDD;&#x6846;&#x3002;IE &#x6D4F;&#x89C8;&#x5668;&#x9700;&#x8981;&#x663E;&#x5F0F;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x975E;&#x7A7A;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x624D;&#x4F1A;&#x5F39;&#x51FA;&#x5BF9;&#x8BDD;&#x6846;&#x3002;&#x800C;&#x4E14;&#xFF0C;&#x5927;&#x591A;&#x6570;&#x6D4F;&#x89C8;&#x5668;&#x5728;&#x5BF9;&#x8BDD;&#x6846;&#x4E2D;&#x4E0D;&#x663E;&#x793A;&#x6307;&#x5B9A;&#x6587;&#x672C;&#xFF0C;&#x53EA;&#x663E;&#x793A;&#x9ED8;&#x8BA4;&#x6587;&#x672C;&#x3002;&#x56E0;&#x6B64;&#xFF0C;&#x53EF;&#x4EE5;&#x91C7;&#x7528;&#x4E0B;&#x9762;&#x7684;&#x5199;&#x6CD5;&#xFF0C;&#x53D6;&#x5F97;&#x6700;&#x5927;&#x7684;&#x517C;&#x5BB9;&#x6027;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;beforeunload&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">e</span>) </span>{
  <span class="hljs-keyword">var</span> confirmationMessage = <span class="hljs-string">&apos;&#x786E;&#x8BA4;&#x5173;&#x95ED;&#x7A97;&#x53E3;&#xFF1F;&apos;</span>;

  e.returnValue = confirmationMessage;
  <span class="hljs-keyword">return</span> confirmationMessage;
});
</code></pre>
<p>&#x6CE8;&#x610F;&#xFF0C;&#x8BB8;&#x591A;&#x624B;&#x673A;&#x6D4F;&#x89C8;&#x5668;&#x9ED8;&#x8BA4;&#x5FFD;&#x7565;&#x8FD9;&#x4E2A;&#x4E8B;&#x4EF6;&#xFF0C;&#x684C;&#x9762;&#x6D4F;&#x89C8;&#x5668;&#x4E5F;&#x6709;&#x529E;&#x6CD5;&#x5FFD;&#x7565;&#x8FD9;&#x4E2A;&#x4E8B;&#x4EF6;&#x3002;&#x6240;&#x4EE5;&#xFF0C;&#x5B83;&#x53EF;&#x80FD;&#x6839;&#x672C;&#x4E0D;&#x4F1A;&#x751F;&#x6548;&#xFF0C;&#x4E0D;&#x80FD;&#x4F9D;&#x8D56;&#x5B83;&#x6765;&#x963B;&#x6B62;&#x7528;&#x6237;&#x5173;&#x95ED;&#x7A97;&#x53E3;&#x3002;&#x53E6;&#x5916;&#xFF0C;&#x4E00;&#x65E6;&#x4F7F;&#x7528;&#x4E86;<code>beforeunload</code>&#x4E8B;&#x4EF6;&#xFF0C;&#x6D4F;&#x89C8;&#x5668;&#x5C31;&#x4E0D;&#x4F1A;&#x7F13;&#x5B58;&#x5F53;&#x524D;&#x7F51;&#x9875;&#xFF0C;&#x4F7F;&#x7528;&#x201C;&#x56DE;&#x9000;&#x201D;&#x6309;&#x94AE;&#x5C06;&#x91CD;&#x65B0;&#x5411;&#x670D;&#x52A1;&#x5668;&#x8BF7;&#x6C42;&#x7F51;&#x9875;&#x3002;&#x8FD9;&#x662F;&#x56E0;&#x4E3A;&#x76D1;&#x542C;&#x8FD9;&#x4E2A;&#x4E8B;&#x4EF6;&#x7684;&#x76EE;&#x7684;&#xFF0C;&#x4E00;&#x822C;&#x662F;&#x4FEE;&#x6539;&#x521D;&#x59CB;&#x72B6;&#x6001;&#xFF0C;&#x8FD9;&#x65F6;&#x7F13;&#x5B58;&#x521D;&#x59CB;&#x9875;&#x9762;&#x5C31;&#x6CA1;&#x610F;&#x4E49;&#x4E86;&#x3002;</p>
<p>&#x57FA;&#x672C;&#x4E0A;&#xFF0C;&#x53EA;&#x6709;&#x4E00;&#x79CD;&#x573A;&#x5408;&#x53EF;&#x4EE5;&#x76D1;&#x542C;<code>unload</code>&#x4E8B;&#x4EF6;&#xFF0C;&#x5176;&#x4ED6;&#x60C5;&#x51B5;&#x90FD;&#x4E0D;&#x5E94;&#x8BE5;&#x76D1;&#x542C;&#xFF1A;&#x7528;&#x6237;&#x4FEE;&#x6539;&#x4E86;&#x8868;&#x5355;&#xFF0C;&#x8FD8;&#x6CA1;&#x6709;&#x4FDD;&#x5B58;&#x5C31;&#x8981;&#x79BB;&#x5F00;&#x3002;</p>
<h3 id="unload-&#x4E8B;&#x4EF6;">unload &#x4E8B;&#x4EF6;</h3>
<p><code>unload</code>&#x4E8B;&#x4EF6;&#x5728;&#x7A97;&#x53E3;&#x5173;&#x95ED;&#x6216;&#x8005;<code>document</code>&#x5BF9;&#x8C61;&#x5C06;&#x8981;&#x5378;&#x8F7D;&#x65F6;&#x89E6;&#x53D1;&#x3002;&#x5B83;&#x7684;&#x89E6;&#x53D1;&#x987A;&#x5E8F;&#x6392;&#x5728;<code>beforeunload</code>&#x3001;<code>pagehide</code>&#x4E8B;&#x4EF6;&#x540E;&#x9762;&#x3002;</p>
<p><code>unload</code>&#x4E8B;&#x4EF6;&#x53D1;&#x751F;&#x65F6;&#xFF0C;&#x6587;&#x6863;&#x5904;&#x4E8E;&#x4E00;&#x4E2A;&#x7279;&#x6B8A;&#x72B6;&#x6001;&#x3002;&#x6240;&#x6709;&#x8D44;&#x6E90;&#x4F9D;&#x7136;&#x5B58;&#x5728;&#xFF0C;&#x4F46;&#x662F;&#x5BF9;&#x7528;&#x6237;&#x6765;&#x8BF4;&#x90FD;&#x4E0D;&#x53EF;&#x89C1;&#xFF0C;UI &#x4E92;&#x52A8;&#x5168;&#x90E8;&#x65E0;&#x6548;&#x3002;&#x8FD9;&#x4E2A;&#x4E8B;&#x4EF6;&#x662F;&#x65E0;&#x6CD5;&#x53D6;&#x6D88;&#x7684;&#xFF0C;&#x5373;&#x4F7F;&#x5728;&#x76D1;&#x542C;&#x51FD;&#x6570;&#x91CC;&#x9762;&#x629B;&#x51FA;&#x9519;&#x8BEF;&#xFF0C;&#x4E5F;&#x4E0D;&#x80FD;&#x505C;&#x6B62;&#x6587;&#x6863;&#x7684;&#x5378;&#x8F7D;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;unload&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">event</span>) </span>{
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;&#x6587;&#x6863;&#x5C06;&#x8981;&#x5378;&#x8F7D;&apos;</span>);
});
</code></pre>
<p>&#x624B;&#x673A;&#x4E0A;&#xFF0C;&#x6D4F;&#x89C8;&#x5668;&#x6216;&#x7CFB;&#x7EDF;&#x53EF;&#x80FD;&#x4F1A;&#x76F4;&#x63A5;&#x4E22;&#x5F03;&#x7F51;&#x9875;&#xFF0C;&#x8FD9;&#x65F6;&#x8BE5;&#x4E8B;&#x4EF6;&#x6839;&#x672C;&#x4E0D;&#x4F1A;&#x53D1;&#x751F;&#x3002;&#x800C;&#x4E14;&#x8DDF;<code>beforeunload</code>&#x4E8B;&#x4EF6;&#x4E00;&#x6837;&#xFF0C;&#x4E00;&#x65E6;&#x4F7F;&#x7528;&#x4E86;<code>unload</code>&#x4E8B;&#x4EF6;&#xFF0C;&#x6D4F;&#x89C8;&#x5668;&#x5C31;&#x4E0D;&#x4F1A;&#x7F13;&#x5B58;&#x5F53;&#x524D;&#x7F51;&#x9875;&#xFF0C;&#x7406;&#x7531;&#x540C;&#x4E0A;&#x3002;&#x56E0;&#x6B64;&#xFF0C;&#x4EFB;&#x4F55;&#x60C5;&#x51B5;&#x4E0B;&#x90FD;&#x4E0D;&#x5E94;&#x8BE5;&#x4F9D;&#x8D56;&#x8FD9;&#x4E2A;&#x4E8B;&#x4EF6;&#xFF0C;&#x6307;&#x5B9A;&#x7F51;&#x9875;&#x5378;&#x8F7D;&#x65F6;&#x8981;&#x6267;&#x884C;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x53EF;&#x4EE5;&#x8003;&#x8651;&#x5B8C;&#x5168;&#x4E0D;&#x4F7F;&#x7528;&#x8FD9;&#x4E2A;&#x4E8B;&#x4EF6;&#x3002;</p>
<h3 id="load-&#x4E8B;&#x4EF6;&#xFF0C;error-&#x4E8B;&#x4EF6;">load &#x4E8B;&#x4EF6;&#xFF0C;error &#x4E8B;&#x4EF6;</h3>
<p><code>load</code>&#x4E8B;&#x4EF6;&#x5728;&#x9875;&#x9762;&#x6216;&#x67D0;&#x4E2A;&#x8D44;&#x6E90;&#x52A0;&#x8F7D;&#x6210;&#x529F;&#x65F6;&#x89E6;&#x53D1;&#x3002;&#x6CE8;&#x610F;&#xFF0C;&#x9875;&#x9762;&#x6216;&#x8D44;&#x6E90;&#x4ECE;&#x6D4F;&#x89C8;&#x5668;&#x7F13;&#x5B58;&#x52A0;&#x8F7D;&#xFF0C;&#x5E76;&#x4E0D;&#x4F1A;&#x89E6;&#x53D1;<code>load</code>&#x4E8B;&#x4EF6;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;load&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">event</span>) </span>{
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;&#x6240;&#x6709;&#x8D44;&#x6E90;&#x90FD;&#x52A0;&#x8F7D;&#x5B8C;&#x6210;&apos;</span>);
});
</code></pre>
<p><code>error</code>&#x4E8B;&#x4EF6;&#x662F;&#x5728;&#x9875;&#x9762;&#x6216;&#x8D44;&#x6E90;&#x52A0;&#x8F7D;&#x5931;&#x8D25;&#x65F6;&#x89E6;&#x53D1;&#x3002;<code>abort</code>&#x4E8B;&#x4EF6;&#x5728;&#x7528;&#x6237;&#x53D6;&#x6D88;&#x52A0;&#x8F7D;&#x65F6;&#x89E6;&#x53D1;&#x3002;</p>
<p>&#x8FD9;&#x4E09;&#x4E2A;&#x4E8B;&#x4EF6;&#x5B9E;&#x9645;&#x4E0A;&#x5C5E;&#x4E8E;&#x8FDB;&#x5EA6;&#x4E8B;&#x4EF6;&#xFF0C;&#x4E0D;&#x4EC5;&#x53D1;&#x751F;&#x5728;<code>document</code>&#x5BF9;&#x8C61;&#xFF0C;&#x8FD8;&#x53D1;&#x751F;&#x5728;&#x5404;&#x79CD;&#x5916;&#x90E8;&#x8D44;&#x6E90;&#x4E0A;&#x9762;&#x3002;&#x6D4F;&#x89C8;&#x7F51;&#x9875;&#x5C31;&#x662F;&#x4E00;&#x4E2A;&#x52A0;&#x8F7D;&#x5404;&#x79CD;&#x8D44;&#x6E90;&#x7684;&#x8FC7;&#x7A0B;&#xFF0C;&#x56FE;&#x50CF;&#xFF08;image&#xFF09;&#x3001;&#x6837;&#x5F0F;&#x8868;&#xFF08;style sheet&#xFF09;&#x3001;&#x811A;&#x672C;&#xFF08;script&#xFF09;&#x3001;&#x89C6;&#x9891;&#xFF08;video&#xFF09;&#x3001;&#x97F3;&#x9891;&#xFF08;audio&#xFF09;&#x3001;Ajax&#x8BF7;&#x6C42;&#xFF08;XMLHttpRequest&#xFF09;&#x7B49;&#x7B49;&#x3002;&#x8FD9;&#x4E9B;&#x8D44;&#x6E90;&#x548C;<code>document</code>&#x5BF9;&#x8C61;&#x3001;<code>window</code>&#x5BF9;&#x8C61;&#x3001;XMLHttpRequestUpload &#x5BF9;&#x8C61;&#xFF0C;&#x90FD;&#x4F1A;&#x89E6;&#x53D1;<code>load</code>&#x4E8B;&#x4EF6;&#x548C;<code>error</code>&#x4E8B;&#x4EF6;&#x3002;</p>
<h2 id="session-&#x5386;&#x53F2;&#x4E8B;&#x4EF6;">session &#x5386;&#x53F2;&#x4E8B;&#x4EF6;</h2>
<h3 id="pageshow-&#x4E8B;&#x4EF6;&#xFF0C;pagehide-&#x4E8B;&#x4EF6;">pageshow &#x4E8B;&#x4EF6;&#xFF0C;pagehide &#x4E8B;&#x4EF6;</h3>
<p>&#x9ED8;&#x8BA4;&#x60C5;&#x51B5;&#x4E0B;&#xFF0C;&#x6D4F;&#x89C8;&#x5668;&#x4F1A;&#x5728;&#x5F53;&#x524D;&#x4F1A;&#x8BDD;&#xFF08;session&#xFF09;&#x7F13;&#x5B58;&#x9875;&#x9762;&#xFF0C;&#x5F53;&#x7528;&#x6237;&#x70B9;&#x51FB;&#x201C;&#x524D;&#x8FDB;/&#x540E;&#x9000;&#x201D;&#x6309;&#x94AE;&#x65F6;&#xFF0C;&#x6D4F;&#x89C8;&#x5668;&#x5C31;&#x4F1A;&#x4ECE;&#x7F13;&#x5B58;&#x4E2D;&#x52A0;&#x8F7D;&#x9875;&#x9762;&#x3002;</p>
<p>pageshow &#x4E8B;&#x4EF6;&#x5728;&#x9875;&#x9762;&#x52A0;&#x8F7D;&#x65F6;&#x89E6;&#x53D1;&#xFF0C;&#x5305;&#x62EC;&#x7B2C;&#x4E00;&#x6B21;&#x52A0;&#x8F7D;&#x548C;&#x4ECE;&#x7F13;&#x5B58;&#x52A0;&#x8F7D;&#x4E24;&#x79CD;&#x60C5;&#x51B5;&#x3002;&#x5982;&#x679C;&#x8981;&#x6307;&#x5B9A;&#x9875;&#x9762;&#x6BCF;&#x6B21;&#x52A0;&#x8F7D;&#xFF08;&#x4E0D;&#x7BA1;&#x662F;&#x4E0D;&#x662F;&#x4ECE;&#x6D4F;&#x89C8;&#x5668;&#x7F13;&#x5B58;&#xFF09;&#x65F6;&#x90FD;&#x8FD0;&#x884C;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x53EF;&#x4EE5;&#x653E;&#x5728;&#x8FD9;&#x4E2A;&#x4E8B;&#x4EF6;&#x7684;&#x76D1;&#x542C;&#x51FD;&#x6570;&#x3002;</p>
<p>&#x7B2C;&#x4E00;&#x6B21;&#x52A0;&#x8F7D;&#x65F6;&#xFF0C;&#x5B83;&#x7684;&#x89E6;&#x53D1;&#x987A;&#x5E8F;&#x6392;&#x5728;<code>load</code>&#x4E8B;&#x4EF6;&#x540E;&#x9762;&#x3002;&#x4ECE;&#x7F13;&#x5B58;&#x52A0;&#x8F7D;&#x65F6;&#xFF0C;<code>load</code>&#x4E8B;&#x4EF6;&#x4E0D;&#x4F1A;&#x89E6;&#x53D1;&#xFF0C;&#x56E0;&#x4E3A;&#x7F51;&#x9875;&#x5728;&#x7F13;&#x5B58;&#x4E2D;&#x7684;&#x6837;&#x5B50;&#x901A;&#x5E38;&#x662F;<code>load</code>&#x4E8B;&#x4EF6;&#x7684;&#x76D1;&#x542C;&#x51FD;&#x6570;&#x8FD0;&#x884C;&#x540E;&#x7684;&#x6837;&#x5B50;&#xFF0C;&#x6240;&#x4EE5;&#x4E0D;&#x5FC5;&#x91CD;&#x590D;&#x6267;&#x884C;&#x3002;&#x540C;&#x7406;&#xFF0C;&#x5982;&#x679C;&#x662F;&#x4ECE;&#x7F13;&#x5B58;&#x4E2D;&#x52A0;&#x8F7D;&#x9875;&#x9762;&#xFF0C;&#x7F51;&#x9875;&#x5185;&#x521D;&#x59CB;&#x5316;&#x7684; JavaScript &#x811A;&#x672C;&#xFF08;&#x6BD4;&#x5982; DOMContentLoaded &#x4E8B;&#x4EF6;&#x7684;&#x76D1;&#x542C;&#x51FD;&#x6570;&#xFF09;&#x4E5F;&#x4E0D;&#x4F1A;&#x6267;&#x884C;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;pageshow&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">event</span>) </span>{
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;pageshow: &apos;</span>, event);
});
</code></pre>
<p>pageshow &#x4E8B;&#x4EF6;&#x6709;&#x4E00;&#x4E2A;<code>persisted</code>&#x5C5E;&#x6027;&#xFF0C;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x5E03;&#x5C14;&#x503C;&#x3002;&#x9875;&#x9762;&#x7B2C;&#x4E00;&#x6B21;&#x52A0;&#x8F7D;&#x65F6;&#xFF0C;&#x8FD9;&#x4E2A;&#x5C5E;&#x6027;&#x662F;<code>false</code>&#xFF1B;&#x5F53;&#x9875;&#x9762;&#x4ECE;&#x7F13;&#x5B58;&#x52A0;&#x8F7D;&#x65F6;&#xFF0C;&#x8FD9;&#x4E2A;&#x5C5E;&#x6027;&#x662F;<code>true</code>&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;pageshow&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">event</span>)</span>{
  <span class="hljs-keyword">if</span> (event.persisted) {
    <span class="hljs-comment">// ...</span>
  }
});
</code></pre>
<p><code>pagehide</code>&#x4E8B;&#x4EF6;&#x4E0E;<code>pageshow</code>&#x4E8B;&#x4EF6;&#x7C7B;&#x4F3C;&#xFF0C;&#x5F53;&#x7528;&#x6237;&#x901A;&#x8FC7;&#x201C;&#x524D;&#x8FDB;/&#x540E;&#x9000;&#x201D;&#x6309;&#x94AE;&#xFF0C;&#x79BB;&#x5F00;&#x5F53;&#x524D;&#x9875;&#x9762;&#x65F6;&#x89E6;&#x53D1;&#x3002;&#x5B83;&#x4E0E; unload &#x4E8B;&#x4EF6;&#x7684;&#x533A;&#x522B;&#x5728;&#x4E8E;&#xFF0C;&#x5982;&#x679C;&#x5728; window &#x5BF9;&#x8C61;&#x4E0A;&#x5B9A;&#x4E49;<code>unload</code>&#x4E8B;&#x4EF6;&#x7684;&#x76D1;&#x542C;&#x51FD;&#x6570;&#x4E4B;&#x540E;&#xFF0C;&#x9875;&#x9762;&#x4E0D;&#x4F1A;&#x4FDD;&#x5B58;&#x5728;&#x7F13;&#x5B58;&#x4E2D;&#xFF0C;&#x800C;&#x4F7F;&#x7528;<code>pagehide</code>&#x4E8B;&#x4EF6;&#xFF0C;&#x9875;&#x9762;&#x4F1A;&#x4FDD;&#x5B58;&#x5728;&#x7F13;&#x5B58;&#x4E2D;&#x3002;</p>
<p><code>pagehide</code>&#x4E8B;&#x4EF6;&#x5B9E;&#x4F8B;&#x4E5F;&#x6709;&#x4E00;&#x4E2A;<code>persisted</code>&#x5C5E;&#x6027;&#xFF0C;&#x5C06;&#x8FD9;&#x4E2A;&#x5C5E;&#x6027;&#x8BBE;&#x4E3A;<code>true</code>&#xFF0C;&#x5C31;&#x8868;&#x793A;&#x9875;&#x9762;&#x8981;&#x4FDD;&#x5B58;&#x5728;&#x7F13;&#x5B58;&#x4E2D;&#xFF1B;&#x8BBE;&#x4E3A;<code>false</code>&#xFF0C;&#x8868;&#x793A;&#x7F51;&#x9875;&#x4E0D;&#x4FDD;&#x5B58;&#x5728;&#x7F13;&#x5B58;&#x4E2D;&#xFF0C;&#x8FD9;&#x65F6;&#x5982;&#x679C;&#x8BBE;&#x7F6E;&#x4E86;unload &#x4E8B;&#x4EF6;&#x7684;&#x76D1;&#x542C;&#x51FD;&#x6570;&#xFF0C;&#x8BE5;&#x51FD;&#x6570;&#x5C06;&#x5728; pagehide &#x4E8B;&#x4EF6;&#x540E;&#x7ACB;&#x5373;&#x8FD0;&#x884C;&#x3002;</p>
<p>&#x5982;&#x679C;&#x9875;&#x9762;&#x5305;&#x542B;<code>&lt;frame&gt;</code>&#x6216;<code>&lt;iframe&gt;</code>&#x5143;&#x7D20;&#xFF0C;&#x5219;<code>&lt;frame&gt;</code>&#x9875;&#x9762;&#x7684;<code>pageshow</code>&#x4E8B;&#x4EF6;&#x548C;<code>pagehide</code>&#x4E8B;&#x4EF6;&#xFF0C;&#x90FD;&#x4F1A;&#x5728;&#x4E3B;&#x9875;&#x9762;&#x4E4B;&#x524D;&#x89E6;&#x53D1;&#x3002;</p>
<p>&#x6CE8;&#x610F;&#xFF0C;&#x8FD9;&#x4E24;&#x4E2A;&#x4E8B;&#x4EF6;&#x53EA;&#x5728;&#x6D4F;&#x89C8;&#x5668;&#x7684;<code>history</code>&#x5BF9;&#x8C61;&#x53D1;&#x751F;&#x53D8;&#x5316;&#x65F6;&#x89E6;&#x53D1;&#xFF0C;&#x8DDF;&#x7F51;&#x9875;&#x662F;&#x5426;&#x53EF;&#x89C1;&#x6CA1;&#x6709;&#x5173;&#x7CFB;&#x3002;</p>
<h3 id="popstate-&#x4E8B;&#x4EF6;">popstate &#x4E8B;&#x4EF6;</h3>
<p><code>popstate</code>&#x4E8B;&#x4EF6;&#x5728;&#x6D4F;&#x89C8;&#x5668;&#x7684;<code>history</code>&#x5BF9;&#x8C61;&#x7684;&#x5F53;&#x524D;&#x8BB0;&#x5F55;&#x53D1;&#x751F;&#x663E;&#x5F0F;&#x5207;&#x6362;&#x65F6;&#x89E6;&#x53D1;&#x3002;&#x6CE8;&#x610F;&#xFF0C;&#x8C03;&#x7528;<code>history.pushState()</code>&#x6216;<code>history.replaceState()</code>&#xFF0C;&#x5E76;&#x4E0D;&#x4F1A;&#x89E6;&#x53D1;<code>popstate</code>&#x4E8B;&#x4EF6;&#x3002;&#x8BE5;&#x4E8B;&#x4EF6;&#x53EA;&#x5728;&#x7528;&#x6237;&#x5728;<code>history</code>&#x8BB0;&#x5F55;&#x4E4B;&#x95F4;&#x663E;&#x5F0F;&#x5207;&#x6362;&#x65F6;&#x89E6;&#x53D1;&#xFF0C;&#x6BD4;&#x5982;&#x9F20;&#x6807;&#x70B9;&#x51FB;&#x201C;&#x540E;&#x9000;/&#x524D;&#x8FDB;&#x201D;&#x6309;&#x94AE;&#xFF0C;&#x6216;&#x8005;&#x5728;&#x811A;&#x672C;&#x4E2D;&#x8C03;&#x7528;<code>history.back()</code>&#x3001;<code>history.forward()</code>&#x3001;<code>history.go()</code>&#x65F6;&#x89E6;&#x53D1;&#x3002;</p>
<p>&#x8BE5;&#x4E8B;&#x4EF6;&#x5BF9;&#x8C61;&#x6709;&#x4E00;&#x4E2A;<code>state</code>&#x5C5E;&#x6027;&#xFF0C;&#x4FDD;&#x5B58;<code>history.pushState</code>&#x65B9;&#x6CD5;&#x548C;<code>history.replaceState</code>&#x65B9;&#x6CD5;&#x4E3A;&#x5F53;&#x524D;&#x8BB0;&#x5F55;&#x6DFB;&#x52A0;&#x7684;<code>state</code>&#x5BF9;&#x8C61;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">window</span>.onpopstate = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">event</span>) </span>{
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;state: &apos;</span> + event.state);
};
history.pushState({page: <span class="hljs-number">1</span>}, <span class="hljs-string">&apos;title 1&apos;</span>, <span class="hljs-string">&apos;?page=1&apos;</span>);
history.pushState({page: <span class="hljs-number">2</span>}, <span class="hljs-string">&apos;title 2&apos;</span>, <span class="hljs-string">&apos;?page=2&apos;</span>);
history.replaceState({page: <span class="hljs-number">3</span>}, <span class="hljs-string">&apos;title 3&apos;</span>, <span class="hljs-string">&apos;?page=3&apos;</span>);
history.back(); <span class="hljs-comment">// state: {&quot;page&quot;:1}</span>
history.back(); <span class="hljs-comment">// state: null</span>
history.go(<span class="hljs-number">2</span>);  <span class="hljs-comment">// state: {&quot;page&quot;:3}</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;<code>pushState</code>&#x65B9;&#x6CD5;&#x5411;<code>history</code>&#x6DFB;&#x52A0;&#x4E86;&#x4E24;&#x6761;&#x8BB0;&#x5F55;&#xFF0C;&#x7136;&#x540E;<code>replaceState</code>&#x65B9;&#x6CD5;&#x66FF;&#x6362;&#x6389;&#x5F53;&#x524D;&#x8BB0;&#x5F55;&#x3002;&#x56E0;&#x6B64;&#xFF0C;&#x8FDE;&#x7EED;&#x4E24;&#x6B21;<code>back</code>&#x65B9;&#x6CD5;&#xFF0C;&#x4F1A;&#x8BA9;&#x5F53;&#x524D;&#x6761;&#x76EE;&#x9000;&#x56DE;&#x5230;&#x539F;&#x59CB;&#x7F51;&#x5740;&#xFF0C;&#x5B83;&#x6CA1;&#x6709;&#x9644;&#x5E26;<code>state</code>&#x5BF9;&#x8C61;&#xFF0C;&#x6240;&#x4EE5;&#x4E8B;&#x4EF6;&#x7684;<code>state</code>&#x5C5E;&#x6027;&#x4E3A;<code>null</code>&#xFF0C;&#x7136;&#x540E;&#x524D;&#x8FDB;&#x4E24;&#x6761;&#x8BB0;&#x5F55;&#xFF0C;&#x53C8;&#x56DE;&#x5230;<code>replaceState</code>&#x65B9;&#x6CD5;&#x6DFB;&#x52A0;&#x7684;&#x8BB0;&#x5F55;&#x3002;</p>
<p>&#x6D4F;&#x89C8;&#x5668;&#x5BF9;&#x4E8E;&#x9875;&#x9762;&#x9996;&#x6B21;&#x52A0;&#x8F7D;&#xFF0C;&#x662F;&#x5426;&#x89E6;&#x53D1;<code>popstate</code>&#x4E8B;&#x4EF6;&#xFF0C;&#x5904;&#x7406;&#x4E0D;&#x4E00;&#x6837;&#xFF0C;Firefox &#x4E0D;&#x89E6;&#x53D1;&#x8BE5;&#x4E8B;&#x4EF6;&#x3002;</p>
<h3 id="hashchange-&#x4E8B;&#x4EF6;">hashchange &#x4E8B;&#x4EF6;</h3>
<p><code>hashchange</code>&#x4E8B;&#x4EF6;&#x5728; URL &#x7684; hash &#x90E8;&#x5206;&#xFF08;&#x5373;<code>#</code>&#x53F7;&#x540E;&#x9762;&#x7684;&#x90E8;&#x5206;&#xFF0C;&#x5305;&#x62EC;<code>#</code>&#x53F7;&#xFF09;&#x53D1;&#x751F;&#x53D8;&#x5316;&#x65F6;&#x89E6;&#x53D1;&#x3002;&#x8BE5;&#x4E8B;&#x4EF6;&#x4E00;&#x822C;&#x5728;<code>window</code>&#x5BF9;&#x8C61;&#x4E0A;&#x76D1;&#x542C;&#x3002;</p>
<p><code>hashchange</code>&#x7684;&#x4E8B;&#x4EF6;&#x5B9E;&#x4F8B;&#x5177;&#x6709;&#x4E24;&#x4E2A;&#x7279;&#x6709;&#x5C5E;&#x6027;&#xFF1A;<code>oldURL</code>&#x5C5E;&#x6027;&#x548C;<code>newURL</code>&#x5C5E;&#x6027;&#xFF0C;&#x5206;&#x522B;&#x8868;&#x793A;&#x53D8;&#x5316;&#x524D;&#x540E;&#x7684;&#x5B8C;&#x6574; URL&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// URL &#x662F; http://www.example.com/</span>
<span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;hashchange&apos;</span>, myFunction);

<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">myFunction</span>(<span class="hljs-params">e</span>) </span>{
  <span class="hljs-built_in">console</span>.log(e.oldURL);
  <span class="hljs-built_in">console</span>.log(e.newURL);
}

location.hash = <span class="hljs-string">&apos;part2&apos;</span>;
<span class="hljs-comment">// http://www.example.com/</span>
<span class="hljs-comment">// http://www.example.com/#part2</span>
</code></pre>
<h2 id="&#x7F51;&#x9875;&#x72B6;&#x6001;&#x4E8B;&#x4EF6;">&#x7F51;&#x9875;&#x72B6;&#x6001;&#x4E8B;&#x4EF6;</h2>
<h3 id="domcontentloaded-&#x4E8B;&#x4EF6;">DOMContentLoaded &#x4E8B;&#x4EF6;</h3>
<p>&#x7F51;&#x9875;&#x4E0B;&#x8F7D;&#x5E76;&#x89E3;&#x6790;&#x5B8C;&#x6210;&#x4EE5;&#x540E;&#xFF0C;&#x6D4F;&#x89C8;&#x5668;&#x5C31;&#x4F1A;&#x5728;<code>document</code>&#x5BF9;&#x8C61;&#x4E0A;&#x89E6;&#x53D1; DOMContentLoaded &#x4E8B;&#x4EF6;&#x3002;&#x8FD9;&#x65F6;&#xFF0C;&#x4EC5;&#x4EC5;&#x5B8C;&#x6210;&#x4E86;&#x7F51;&#x9875;&#x7684;&#x89E3;&#x6790;&#xFF08;&#x6574;&#x5F20;&#x9875;&#x9762;&#x7684; DOM &#x751F;&#x6210;&#x4E86;&#xFF09;&#xFF0C;&#x6240;&#x6709;&#x5916;&#x90E8;&#x8D44;&#x6E90;&#xFF08;&#x6837;&#x5F0F;&#x8868;&#x3001;&#x811A;&#x672C;&#x3001;iframe &#x7B49;&#x7B49;&#xFF09;&#x53EF;&#x80FD;&#x8FD8;&#x6CA1;&#x6709;&#x4E0B;&#x8F7D;&#x7ED3;&#x675F;&#x3002;&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#xFF0C;&#x8FD9;&#x4E2A;&#x4E8B;&#x4EF6;&#x6BD4;<code>load</code>&#x4E8B;&#x4EF6;&#xFF0C;&#x53D1;&#x751F;&#x65F6;&#x95F4;&#x65E9;&#x5F97;&#x591A;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">document</span>.addEventListener(<span class="hljs-string">&apos;DOMContentLoaded&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">event</span>) </span>{
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;DOM&#x751F;&#x6210;&apos;</span>);
});
</code></pre>
<p>&#x6CE8;&#x610F;&#xFF0C;&#x7F51;&#x9875;&#x7684; JavaScript &#x811A;&#x672C;&#x662F;&#x540C;&#x6B65;&#x6267;&#x884C;&#x7684;&#xFF0C;&#x811A;&#x672C;&#x4E00;&#x65E6;&#x53D1;&#x751F;&#x5835;&#x585E;&#xFF0C;&#x5C06;&#x63A8;&#x8FDF;&#x89E6;&#x53D1;<code>DOMContentLoaded</code>&#x4E8B;&#x4EF6;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">document</span>.addEventListener(<span class="hljs-string">&apos;DOMContentLoaded&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">event</span>) </span>{
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;DOM &#x751F;&#x6210;&apos;</span>);
});

<span class="hljs-comment">// &#x8FD9;&#x6BB5;&#x4EE3;&#x7801;&#x4F1A;&#x63A8;&#x8FDF;&#x89E6;&#x53D1; DOMContentLoaded &#x4E8B;&#x4EF6;</span>
<span class="hljs-keyword">for</span>(<span class="hljs-keyword">var</span> i = <span class="hljs-number">0</span>; i &lt; <span class="hljs-number">1000000000</span>; i++) {
  <span class="hljs-comment">// ...</span>
}
</code></pre>
<h3 id="readystatechange-&#x4E8B;&#x4EF6;">readystatechange &#x4E8B;&#x4EF6;</h3>
<p><code>readystatechange</code>&#x4E8B;&#x4EF6;&#x5F53; Document &#x5BF9;&#x8C61;&#x548C; XMLHttpRequest &#x5BF9;&#x8C61;&#x7684;<code>readyState</code>&#x5C5E;&#x6027;&#x53D1;&#x751F;&#x53D8;&#x5316;&#x65F6;&#x89E6;&#x53D1;&#x3002;<code>document.readyState</code>&#x6709;&#x4E09;&#x4E2A;&#x53EF;&#x80FD;&#x7684;&#x503C;&#xFF1A;<code>loading</code>&#xFF08;&#x7F51;&#x9875;&#x6B63;&#x5728;&#x52A0;&#x8F7D;&#xFF09;&#x3001;<code>interactive</code>&#xFF08;&#x7F51;&#x9875;&#x5DF2;&#x7ECF;&#x89E3;&#x6790;&#x5B8C;&#x6210;&#xFF0C;&#x4F46;&#x662F;&#x5916;&#x90E8;&#x8D44;&#x6E90;&#x4ECD;&#x7136;&#x5904;&#x5728;&#x52A0;&#x8F7D;&#x72B6;&#x6001;&#xFF09;&#x548C;<code>complete</code>&#xFF08;&#x7F51;&#x9875;&#x548C;&#x6240;&#x6709;&#x5916;&#x90E8;&#x8D44;&#x6E90;&#x5DF2;&#x7ECF;&#x7ED3;&#x675F;&#x52A0;&#x8F7D;&#xFF0C;<code>load</code>&#x4E8B;&#x4EF6;&#x5373;&#x5C06;&#x89E6;&#x53D1;&#xFF09;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">document</span>.onreadystatechange = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
  <span class="hljs-keyword">if</span> (<span class="hljs-built_in">document</span>.readyState === <span class="hljs-string">&apos;interactive&apos;</span>) {
    <span class="hljs-comment">// ...</span>
  }
}
</code></pre>
<p>&#x8FD9;&#x4E2A;&#x4E8B;&#x4EF6;&#x53EF;&#x4EE5;&#x770B;&#x4F5C;<code>DOMContentLoaded</code>&#x4E8B;&#x4EF6;&#x7684;&#x53E6;&#x4E00;&#x79CD;&#x5B9E;&#x73B0;&#x65B9;&#x6CD5;&#x3002;</p>
<h2 id="&#x7A97;&#x53E3;&#x4E8B;&#x4EF6;">&#x7A97;&#x53E3;&#x4E8B;&#x4EF6;</h2>
<h3 id="scroll-&#x4E8B;&#x4EF6;">scroll &#x4E8B;&#x4EF6;</h3>
<p><code>scroll</code>&#x4E8B;&#x4EF6;&#x5728;&#x6587;&#x6863;&#x6216;&#x6587;&#x6863;&#x5143;&#x7D20;&#x6EDA;&#x52A8;&#x65F6;&#x89E6;&#x53D1;&#xFF0C;&#x4E3B;&#x8981;&#x51FA;&#x73B0;&#x5728;&#x7528;&#x6237;&#x62D6;&#x52A8;&#x6EDA;&#x52A8;&#x6761;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;scroll&apos;</span>, callback);
</code></pre>
<p>&#x8BE5;&#x4E8B;&#x4EF6;&#x4F1A;&#x8FDE;&#x7EED;&#x5730;&#x5927;&#x91CF;&#x89E6;&#x53D1;&#xFF0C;&#x6240;&#x4EE5;&#x5B83;&#x7684;&#x76D1;&#x542C;&#x51FD;&#x6570;&#x4E4B;&#x4E2D;&#x4E0D;&#x5E94;&#x8BE5;&#x6709;&#x975E;&#x5E38;&#x8017;&#x8D39;&#x8BA1;&#x7B97;&#x7684;&#x64CD;&#x4F5C;&#x3002;&#x63A8;&#x8350;&#x7684;&#x505A;&#x6CD5;&#x662F;&#x4F7F;&#x7528;<code>requestAnimationFrame</code>&#x6216;<code>setTimeout</code>&#x63A7;&#x5236;&#x8BE5;&#x4E8B;&#x4EF6;&#x7684;&#x89E6;&#x53D1;&#x9891;&#x7387;&#xFF0C;&#x7136;&#x540E;&#x53EF;&#x4EE5;&#x7ED3;&#x5408;<code>customEvent</code>&#x629B;&#x51FA;&#x4E00;&#x4E2A;&#x65B0;&#x4E8B;&#x4EF6;&#x3002;</p>
<pre><code class="lang-javascript">(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
  <span class="hljs-keyword">var</span> throttle = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">type, name, obj</span>) </span>{
    <span class="hljs-keyword">var</span> obj = obj || <span class="hljs-built_in">window</span>;
    <span class="hljs-keyword">var</span> running = <span class="hljs-literal">false</span>;
    <span class="hljs-keyword">var</span> func = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
      <span class="hljs-keyword">if</span> (running) { <span class="hljs-keyword">return</span>; }
      running = <span class="hljs-literal">true</span>;
      requestAnimationFrame(<span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) </span>{
        obj.dispatchEvent(<span class="hljs-keyword">new</span> CustomEvent(name));
        running = <span class="hljs-literal">false</span>;
      });
    };
    obj.addEventListener(type, func);
  };

  <span class="hljs-comment">// &#x5C06; scroll &#x4E8B;&#x4EF6;&#x91CD;&#x5B9A;&#x4E49;&#x4E3A; optimizedScroll &#x4E8B;&#x4EF6;</span>
  throttle(<span class="hljs-string">&apos;scroll&apos;</span>, <span class="hljs-string">&apos;optimizedScroll&apos;</span>);
})();

<span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;optimizedScroll&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) </span>{
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;Resource conscious scroll callback!&apos;</span>);
});
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;<code>throttle</code>&#x51FD;&#x6570;&#x7528;&#x4E8E;&#x63A7;&#x5236;&#x4E8B;&#x4EF6;&#x89E6;&#x53D1;&#x9891;&#x7387;&#xFF0C;<code>requestAnimationFrame</code>&#x65B9;&#x6CD5;&#x4FDD;&#x8BC1;&#x6BCF;&#x6B21;&#x9875;&#x9762;&#x91CD;&#x7ED8;&#xFF08;&#x6BCF;&#x79D2;60&#x6B21;&#xFF09;&#xFF0C;&#x53EA;&#x4F1A;&#x89E6;&#x53D1;&#x4E00;&#x6B21;<code>scroll</code>&#x4E8B;&#x4EF6;&#x7684;&#x76D1;&#x542C;&#x51FD;&#x6570;&#x3002;&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#xFF0C;&#x4E0A;&#x9762;&#x65B9;&#x6CD5;&#x5C06;<code>scroll</code>&#x4E8B;&#x4EF6;&#x7684;&#x89E6;&#x53D1;&#x9891;&#x7387;&#xFF0C;&#x9650;&#x5236;&#x5728;&#x6BCF;&#x79D2;60&#x6B21;&#x3002;&#x5177;&#x4F53;&#x6765;&#x8BF4;&#xFF0C;&#x5C31;&#x662F;<code>scroll</code>&#x4E8B;&#x4EF6;&#x53EA;&#x8981;&#x9891;&#x7387;&#x4F4E;&#x4E8E;&#x6BCF;&#x79D2;60&#x6B21;&#xFF0C;&#x5C31;&#x4F1A;&#x89E6;&#x53D1;<code>optimizedScroll</code>&#x4E8B;&#x4EF6;&#xFF0C;&#x4ECE;&#x800C;&#x6267;&#x884C;<code>optimizedScroll</code>&#x4E8B;&#x4EF6;&#x7684;&#x76D1;&#x542C;&#x51FD;&#x6570;&#x3002;</p>
<p>&#x6539;&#x7528;<code>setTimeout</code>&#x65B9;&#x6CD5;&#xFF0C;&#x53EF;&#x4EE5;&#x653E;&#x7F6E;&#x66F4;&#x5927;&#x7684;&#x65F6;&#x95F4;&#x95F4;&#x9694;&#x3002;</p>
<pre><code class="lang-javascript">(<span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) </span>{
  <span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;scroll&apos;</span>, scrollThrottler, <span class="hljs-literal">false</span>);

  <span class="hljs-keyword">var</span> scrollTimeout;
  <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">scrollThrottler</span>(<span class="hljs-params"></span>) </span>{
    <span class="hljs-keyword">if</span> (!scrollTimeout) {
      scrollTimeout = setTimeout(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
        scrollTimeout = <span class="hljs-literal">null</span>;
        actualScrollHandler();
      }, <span class="hljs-number">66</span>);
    }
  }

  <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">actualScrollHandler</span>(<span class="hljs-params"></span>) </span>{
    <span class="hljs-comment">// ...</span>
  }
}());
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x6BCF;&#x6B21;<code>scroll</code>&#x4E8B;&#x4EF6;&#x90FD;&#x4F1A;&#x6267;&#x884C;<code>scrollThrottler</code>&#x51FD;&#x6570;&#x3002;&#x8BE5;&#x51FD;&#x6570;&#x91CC;&#x9762;&#x6709;&#x4E00;&#x4E2A;&#x5B9A;&#x65F6;&#x5668;<code>setTimeout</code>&#xFF0C;&#x6BCF;66&#x6BEB;&#x79D2;&#x89E6;&#x53D1;&#x4E00;&#x6B21;&#xFF08;&#x6BCF;&#x79D2;15&#x6B21;&#xFF09;&#x771F;&#x6B63;&#x6267;&#x884C;&#x7684;&#x4EFB;&#x52A1;<code>actualScrollHandler</code>&#x3002;</p>
<p>&#x4E0B;&#x9762;&#x662F;&#x4E00;&#x4E2A;&#x66F4;&#x4E00;&#x822C;&#x7684;<code>throttle</code>&#x51FD;&#x6570;&#x7684;&#x5199;&#x6CD5;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">throttle</span>(<span class="hljs-params">fn, wait</span>) </span>{
  <span class="hljs-keyword">var</span> time = <span class="hljs-built_in">Date</span>.now();
  <span class="hljs-keyword">return</span> <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) </span>{
    <span class="hljs-keyword">if</span> ((time + wait - <span class="hljs-built_in">Date</span>.now()) &lt; <span class="hljs-number">0</span>) {
      fn();
      time = <span class="hljs-built_in">Date</span>.now();
    }
  }
}

<span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;scroll&apos;</span>, throttle(callback, <span class="hljs-number">1000</span>));
</code></pre>
<p>&#x4E0A;&#x9762;&#x7684;&#x4EE3;&#x7801;&#x5C06;<code>scroll</code>&#x4E8B;&#x4EF6;&#x7684;&#x89E6;&#x53D1;&#x9891;&#x7387;&#xFF0C;&#x9650;&#x5236;&#x5728;&#x4E00;&#x79D2;&#x4E00;&#x6B21;&#x3002;</p>
<p><code>lodash</code>&#x51FD;&#x6570;&#x5E93;&#x63D0;&#x4F9B;&#x4E86;&#x73B0;&#x6210;&#x7684;<code>throttle</code>&#x51FD;&#x6570;&#xFF0C;&#x53EF;&#x4EE5;&#x76F4;&#x63A5;&#x4F7F;&#x7528;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;scroll&apos;</span>, _.throttle(callback, <span class="hljs-number">1000</span>));
</code></pre>
<p>&#x672C;&#x4E66;&#x524D;&#x9762;&#x4ECB;&#x7ECD;&#x8FC7;<code>debounce</code>&#x7684;&#x6982;&#x5FF5;&#xFF0C;<code>throttle</code>&#x4E0E;&#x5B83;&#x533A;&#x522B;&#x5728;&#x4E8E;&#xFF0C;<code>throttle</code>&#x662F;&#x201C;&#x8282;&#x6D41;&#x201D;&#xFF0C;&#x786E;&#x4FDD;&#x4E00;&#x6BB5;&#x65F6;&#x95F4;&#x5185;&#x53EA;&#x6267;&#x884C;&#x4E00;&#x6B21;&#xFF0C;&#x800C;<code>debounce</code>&#x662F;&#x201C;&#x9632;&#x6296;&#x201D;&#xFF0C;&#x8981;&#x8FDE;&#x7EED;&#x64CD;&#x4F5C;&#x7ED3;&#x675F;&#x540E;&#x518D;&#x6267;&#x884C;&#x3002;&#x4EE5;&#x7F51;&#x9875;&#x6EDA;&#x52A8;&#x4E3A;&#x4F8B;&#xFF0C;<code>debounce</code>&#x8981;&#x7B49;&#x5230;&#x7528;&#x6237;&#x505C;&#x6B62;&#x6EDA;&#x52A8;&#x540E;&#x624D;&#x6267;&#x884C;&#xFF0C;<code>throttle</code>&#x5219;&#x662F;&#x5982;&#x679C;&#x7528;&#x6237;&#x4E00;&#x76F4;&#x5728;&#x6EDA;&#x52A8;&#x7F51;&#x9875;&#xFF0C;&#x90A3;&#x4E48;&#x5728;&#x6EDA;&#x52A8;&#x8FC7;&#x7A0B;&#x4E2D;&#x8FD8;&#x662F;&#x4F1A;&#x6267;&#x884C;&#x3002;</p>
<h3 id="resize-&#x4E8B;&#x4EF6;">resize &#x4E8B;&#x4EF6;</h3>
<p><code>resize</code>&#x4E8B;&#x4EF6;&#x5728;&#x6539;&#x53D8;&#x6D4F;&#x89C8;&#x5668;&#x7A97;&#x53E3;&#x5927;&#x5C0F;&#x65F6;&#x89E6;&#x53D1;&#xFF0C;&#x4E3B;&#x8981;&#x53D1;&#x751F;&#x5728;<code>window</code>&#x5BF9;&#x8C61;&#x4E0A;&#x9762;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> resizeMethod = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
  <span class="hljs-keyword">if</span> (<span class="hljs-built_in">document</span>.body.clientWidth &lt; <span class="hljs-number">768</span>) {
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;&#x79FB;&#x52A8;&#x8BBE;&#x5907;&#x7684;&#x89C6;&#x53E3;&apos;</span>);
  }
};

<span class="hljs-built_in">window</span>.addEventListener(<span class="hljs-string">&apos;resize&apos;</span>, resizeMethod, <span class="hljs-literal">true</span>);
</code></pre>
<p>&#x8BE5;&#x4E8B;&#x4EF6;&#x4E5F;&#x4F1A;&#x8FDE;&#x7EED;&#x5730;&#x5927;&#x91CF;&#x89E6;&#x53D1;&#xFF0C;&#x6240;&#x4EE5;&#x6700;&#x597D;&#x50CF;&#x4E0A;&#x9762;&#x7684;<code>scroll</code>&#x4E8B;&#x4EF6;&#x4E00;&#x6837;&#xFF0C;&#x901A;&#x8FC7;<code>throttle</code>&#x51FD;&#x6570;&#x63A7;&#x5236;&#x4E8B;&#x4EF6;&#x89E6;&#x53D1;&#x9891;&#x7387;&#x3002;</p>
<h3 id="fullscreenchange-&#x4E8B;&#x4EF6;&#xFF0C;fullscreenerror-&#x4E8B;&#x4EF6;">fullscreenchange &#x4E8B;&#x4EF6;&#xFF0C;fullscreenerror &#x4E8B;&#x4EF6;</h3>
<p><code>fullscreenchange</code>&#x4E8B;&#x4EF6;&#x5728;&#x8FDB;&#x5165;&#x6216;&#x9000;&#x51FA;&#x5168;&#x5C4F;&#x72B6;&#x6001;&#x65F6;&#x89E6;&#x53D1;&#xFF0C;&#x8BE5;&#x4E8B;&#x4EF6;&#x53D1;&#x751F;&#x5728;<code>document</code>&#x5BF9;&#x8C61;&#x4E0A;&#x9762;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">document</span>.addEventListener(<span class="hljs-string">&apos;fullscreenchange&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">event</span>) </span>{
  <span class="hljs-built_in">console</span>.log(<span class="hljs-built_in">document</span>.fullscreenElement);
});
</code></pre>
<p><code>fullscreenerror</code>&#x4E8B;&#x4EF6;&#x5728;&#x6D4F;&#x89C8;&#x5668;&#x65E0;&#x6CD5;&#x5207;&#x6362;&#x5230;&#x5168;&#x5C4F;&#x72B6;&#x6001;&#x65F6;&#x89E6;&#x53D1;&#x3002;</p>
<h2 id="&#x526A;&#x8D34;&#x677F;&#x4E8B;&#x4EF6;">&#x526A;&#x8D34;&#x677F;&#x4E8B;&#x4EF6;</h2>
<p>&#x4EE5;&#x4E0B;&#x4E09;&#x4E2A;&#x4E8B;&#x4EF6;&#x5C5E;&#x4E8E;&#x526A;&#x8D34;&#x677F;&#x64CD;&#x4F5C;&#x7684;&#x76F8;&#x5173;&#x4E8B;&#x4EF6;&#x3002;</p>
<ul>
<li><code>cut</code>&#xFF1A;&#x5C06;&#x9009;&#x4E2D;&#x7684;&#x5185;&#x5BB9;&#x4ECE;&#x6587;&#x6863;&#x4E2D;&#x79FB;&#x9664;&#xFF0C;&#x52A0;&#x5165;&#x526A;&#x8D34;&#x677F;&#x65F6;&#x89E6;&#x53D1;&#x3002;</li>
<li><code>copy</code>&#xFF1A;&#x8FDB;&#x884C;&#x590D;&#x5236;&#x52A8;&#x4F5C;&#x65F6;&#x89E6;&#x53D1;&#x3002;</li>
<li><code>paste</code>&#xFF1A;&#x526A;&#x8D34;&#x677F;&#x5185;&#x5BB9;&#x7C98;&#x8D34;&#x5230;&#x6587;&#x6863;&#x540E;&#x89E6;&#x53D1;&#x3002;</li>
</ul>
<p>&#x8FD9;&#x4E09;&#x4E2A;&#x4E8B;&#x4EF6;&#x90FD;&#x662F;<code>ClipboardEvent</code>&#x63A5;&#x53E3;&#x7684;&#x5B9E;&#x4F8B;&#x3002;<code>ClipboardEvent</code>&#x6709;&#x4E00;&#x4E2A;&#x5B9E;&#x4F8B;&#x5C5E;&#x6027;<code>clipboardData</code>&#xFF0C;&#x662F;&#x4E00;&#x4E2A; DataTransfer &#x5BF9;&#x8C61;&#xFF0C;&#x5B58;&#x653E;&#x526A;&#x8D34;&#x7684;&#x6570;&#x636E;&#x3002;&#x5177;&#x4F53;&#x7684; API &#x63A5;&#x53E3;&#x548C;&#x64CD;&#x4F5C;&#x65B9;&#x6CD5;&#xFF0C;&#x8BF7;&#x53C2;&#x89C1;&#x300A;&#x62D6;&#x62C9;&#x4E8B;&#x4EF6;&#x300B;&#x7684; DataTransfer &#x5BF9;&#x8C61;&#x90E8;&#x5206;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">document</span>.addEventListener(<span class="hljs-string">&apos;copy&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">e</span>) </span>{
  e.clipboardData.setData(<span class="hljs-string">&apos;text/plain&apos;</span>, <span class="hljs-string">&apos;Hello, world!&apos;</span>);
  e.clipboardData.setData(<span class="hljs-string">&apos;text/html&apos;</span>, <span class="hljs-string">&apos;&lt;b&gt;Hello, world!&lt;/b&gt;&apos;</span>);
  e.preventDefault();
});
</code></pre>
<p>&#x4E0A;&#x9762;&#x7684;&#x4EE3;&#x7801;&#x4F7F;&#x5F97;&#x590D;&#x5236;&#x8FDB;&#x5165;&#x526A;&#x8D34;&#x677F;&#x7684;&#xFF0C;&#x90FD;&#x662F;&#x5F00;&#x53D1;&#x8005;&#x6307;&#x5B9A;&#x7684;&#x6570;&#x636E;&#xFF0C;&#x800C;&#x4E0D;&#x662F;&#x7528;&#x6237;&#x60F3;&#x8981;&#x62F7;&#x8D1D;&#x7684;&#x6570;&#x636E;&#x3002;</p>
<h2 id="&#x7126;&#x70B9;&#x4E8B;&#x4EF6;">&#x7126;&#x70B9;&#x4E8B;&#x4EF6;</h2>
<p>&#x7126;&#x70B9;&#x4E8B;&#x4EF6;&#x53D1;&#x751F;&#x5728;&#x5143;&#x7D20;&#x8282;&#x70B9;&#x548C;<code>document</code>&#x5BF9;&#x8C61;&#x4E0A;&#x9762;&#xFF0C;&#x4E0E;&#x83B7;&#x5F97;&#x6216;&#x5931;&#x53BB;&#x7126;&#x70B9;&#x76F8;&#x5173;&#x3002;&#x5B83;&#x4E3B;&#x8981;&#x5305;&#x62EC;&#x4EE5;&#x4E0B;&#x56DB;&#x4E2A;&#x4E8B;&#x4EF6;&#x3002;</p>
<ul>
<li><code>focus</code>&#xFF1A;&#x5143;&#x7D20;&#x8282;&#x70B9;&#x83B7;&#x5F97;&#x7126;&#x70B9;&#x540E;&#x89E6;&#x53D1;&#xFF0C;&#x8BE5;&#x4E8B;&#x4EF6;&#x4E0D;&#x4F1A;&#x5192;&#x6CE1;&#x3002;</li>
<li><code>blur</code>&#xFF1A;&#x5143;&#x7D20;&#x8282;&#x70B9;&#x5931;&#x53BB;&#x7126;&#x70B9;&#x540E;&#x89E6;&#x53D1;&#xFF0C;&#x8BE5;&#x4E8B;&#x4EF6;&#x4E0D;&#x4F1A;&#x5192;&#x6CE1;&#x3002;</li>
<li><code>focusin</code>&#xFF1A;&#x5143;&#x7D20;&#x8282;&#x70B9;&#x5C06;&#x8981;&#x83B7;&#x5F97;&#x7126;&#x70B9;&#x65F6;&#x89E6;&#x53D1;&#xFF0C;&#x53D1;&#x751F;&#x5728;<code>focus</code>&#x4E8B;&#x4EF6;&#x4E4B;&#x524D;&#x3002;&#x8BE5;&#x4E8B;&#x4EF6;&#x4F1A;&#x5192;&#x6CE1;&#x3002;</li>
<li><code>focusout</code>&#xFF1A;&#x5143;&#x7D20;&#x8282;&#x70B9;&#x5C06;&#x8981;&#x5931;&#x53BB;&#x7126;&#x70B9;&#x65F6;&#x89E6;&#x53D1;&#xFF0C;&#x53D1;&#x751F;&#x5728;<code>blur</code>&#x4E8B;&#x4EF6;&#x4E4B;&#x524D;&#x3002;&#x8BE5;&#x4E8B;&#x4EF6;&#x4F1A;&#x5192;&#x6CE1;&#x3002;</li>
</ul>
<p>&#x8FD9;&#x56DB;&#x4E2A;&#x4E8B;&#x4EF6;&#x90FD;&#x7EE7;&#x627F;&#x4E86;<code>FocusEvent</code>&#x63A5;&#x53E3;&#x3002;<code>FocusEvent</code>&#x5B9E;&#x4F8B;&#x5177;&#x6709;&#x4EE5;&#x4E0B;&#x5C5E;&#x6027;&#x3002;</p>
<ul>
<li><code>FocusEvent.target</code>&#xFF1A;&#x4E8B;&#x4EF6;&#x7684;&#x76EE;&#x6807;&#x8282;&#x70B9;&#x3002;</li>
<li><code>FocusEvent.relatedTarget</code>&#xFF1A;&#x5BF9;&#x4E8E;<code>focusin</code>&#x4E8B;&#x4EF6;&#xFF0C;&#x8FD4;&#x56DE;&#x5931;&#x53BB;&#x7126;&#x70B9;&#x7684;&#x8282;&#x70B9;&#xFF1B;&#x5BF9;&#x4E8E;<code>focusout</code>&#x4E8B;&#x4EF6;&#xFF0C;&#x8FD4;&#x56DE;&#x5C06;&#x8981;&#x63A5;&#x53D7;&#x7126;&#x70B9;&#x7684;&#x8282;&#x70B9;&#xFF1B;&#x5BF9;&#x4E8E;<code>focus</code>&#x548C;<code>blur</code>&#x4E8B;&#x4EF6;&#xFF0C;&#x8FD4;&#x56DE;<code>null</code>&#x3002;</li>
</ul>
<p>&#x7531;&#x4E8E;<code>focus</code>&#x548C;<code>blur</code>&#x4E8B;&#x4EF6;&#x4E0D;&#x4F1A;&#x5192;&#x6CE1;&#xFF0C;&#x53EA;&#x80FD;&#x5728;&#x6355;&#x83B7;&#x9636;&#x6BB5;&#x89E6;&#x53D1;&#xFF0C;&#x6240;&#x4EE5;<code>addEventListener</code>&#x65B9;&#x6CD5;&#x7684;&#x7B2C;&#x4E09;&#x4E2A;&#x53C2;&#x6570;&#x9700;&#x8981;&#x8BBE;&#x4E3A;<code>true</code>&#x3002;</p>
<pre><code class="lang-javascript">form.addEventListener(<span class="hljs-string">&apos;focus&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">event</span>) </span>{
  event.target.style.background = <span class="hljs-string">&apos;pink&apos;</span>;
}, <span class="hljs-literal">true</span>);

form.addEventListener(<span class="hljs-string">&apos;blur&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">event</span>) </span>{
  event.target.style.background = <span class="hljs-string">&apos;&apos;</span>;
}, <span class="hljs-literal">true</span>);
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x9488;&#x5BF9;&#x8868;&#x5355;&#x7684;&#x6587;&#x672C;&#x8F93;&#x5165;&#x6846;&#xFF0C;&#x63A5;&#x53D7;&#x7126;&#x70B9;&#x65F6;&#x8BBE;&#x7F6E;&#x80CC;&#x666F;&#x8272;&#xFF0C;&#x5931;&#x53BB;&#x7126;&#x70B9;&#x65F6;&#x53BB;&#x9664;&#x80CC;&#x666F;&#x8272;&#x3002;</p>
<h2 id="customevent-&#x63A5;&#x53E3;">CustomEvent &#x63A5;&#x53E3;</h2>
<p>CustomEvent &#x63A5;&#x53E3;&#x7528;&#x4E8E;&#x751F;&#x6210;&#x81EA;&#x5B9A;&#x4E49;&#x7684;&#x4E8B;&#x4EF6;&#x5B9E;&#x4F8B;&#x3002;&#x90A3;&#x4E9B;&#x6D4F;&#x89C8;&#x5668;&#x9884;&#x5B9A;&#x4E49;&#x7684;&#x4E8B;&#x4EF6;&#xFF0C;&#x867D;&#x7136;&#x53EF;&#x4EE5;&#x624B;&#x52A8;&#x751F;&#x6210;&#xFF0C;&#x4F46;&#x662F;&#x5F80;&#x5F80;&#x4E0D;&#x80FD;&#x5728;&#x4E8B;&#x4EF6;&#x4E0A;&#x7ED1;&#x5B9A;&#x6570;&#x636E;&#x3002;&#x5982;&#x679C;&#x9700;&#x8981;&#x5728;&#x89E6;&#x53D1;&#x4E8B;&#x4EF6;&#x7684;&#x540C;&#x65F6;&#xFF0C;&#x4F20;&#x5165;&#x6307;&#x5B9A;&#x7684;&#x6570;&#x636E;&#xFF0C;&#x5C31;&#x53EF;&#x4EE5;&#x4F7F;&#x7528; CustomEvent &#x63A5;&#x53E3;&#x751F;&#x6210;&#x7684;&#x81EA;&#x5B9A;&#x4E49;&#x4E8B;&#x4EF6;&#x5BF9;&#x8C61;&#x3002;</p>
<p>&#x6D4F;&#x89C8;&#x5668;&#x539F;&#x751F;&#x63D0;&#x4F9B;<code>CustomEvent()</code>&#x6784;&#x9020;&#x51FD;&#x6570;&#xFF0C;&#x7528;&#x6765;&#x751F;&#x6210; CustomEvent &#x4E8B;&#x4EF6;&#x5B9E;&#x4F8B;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">new</span> CustomEvent(type, options)
</code></pre>
<p><code>CustomEvent()</code>&#x6784;&#x9020;&#x51FD;&#x6570;&#x63A5;&#x53D7;&#x4E24;&#x4E2A;&#x53C2;&#x6570;&#x3002;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x662F;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x8868;&#x793A;&#x4E8B;&#x4EF6;&#x7684;&#x540D;&#x5B57;&#xFF0C;&#x8FD9;&#x662F;&#x5FC5;&#x987B;&#x7684;&#x3002;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#x662F;&#x4E8B;&#x4EF6;&#x7684;&#x914D;&#x7F6E;&#x5BF9;&#x8C61;&#xFF0C;&#x8FD9;&#x4E2A;&#x53C2;&#x6570;&#x662F;&#x53EF;&#x9009;&#x7684;&#x3002;<code>CustomEvent</code>&#x7684;&#x914D;&#x7F6E;&#x5BF9;&#x8C61;&#x9664;&#x4E86;&#x63A5;&#x53D7; Event &#x4E8B;&#x4EF6;&#x7684;&#x914D;&#x7F6E;&#x5C5E;&#x6027;&#xFF0C;&#x53EA;&#x6709;&#x4E00;&#x4E2A;&#x81EA;&#x5DF1;&#x7684;&#x5C5E;&#x6027;&#x3002;</p>
<ul>
<li><code>detail</code>&#xFF1A;&#x8868;&#x793A;&#x4E8B;&#x4EF6;&#x7684;&#x9644;&#x5E26;&#x6570;&#x636E;&#xFF0C;&#x9ED8;&#x8BA4;&#x4E3A;<code>null</code>&#x3002;</li>
</ul>
<p>&#x4E0B;&#x9762;&#x662F;&#x4E00;&#x4E2A;&#x4F8B;&#x5B50;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> event = <span class="hljs-keyword">new</span> CustomEvent(<span class="hljs-string">&apos;build&apos;</span>, { <span class="hljs-string">&apos;detail&apos;</span>: <span class="hljs-string">&apos;hello&apos;</span> });

<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">eventHandler</span>(<span class="hljs-params">e</span>) </span>{
  <span class="hljs-built_in">console</span>.log(e.detail);
}

<span class="hljs-built_in">document</span>.body.addEventListener(<span class="hljs-string">&apos;build&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">e</span>) </span>{
  <span class="hljs-built_in">console</span>.log(e.detail);
});

<span class="hljs-built_in">document</span>.body.dispatchEvent(event);
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x6211;&#x4EEC;&#x624B;&#x52A8;&#x5B9A;&#x4E49;&#x4E86;<code>build</code>&#x4E8B;&#x4EF6;&#x3002;&#x8BE5;&#x4E8B;&#x4EF6;&#x89E6;&#x53D1;&#x540E;&#xFF0C;&#x4F1A;&#x88AB;&#x76D1;&#x542C;&#x5230;&#xFF0C;&#x4ECE;&#x800C;&#x8F93;&#x51FA;&#x8BE5;&#x4E8B;&#x4EF6;&#x5B9E;&#x4F8B;&#x7684;<code>detail</code>&#x5C5E;&#x6027;&#xFF08;&#x5373;&#x5B57;&#x7B26;&#x4E32;<code>hello</code>&#xFF09;&#x3002;</p>
<p>&#x4E0B;&#x9762;&#x662F;&#x53E6;&#x4E00;&#x4E2A;&#x4F8B;&#x5B50;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> myEvent = <span class="hljs-keyword">new</span> CustomEvent(<span class="hljs-string">&apos;myevent&apos;</span>, {
  detail: {
    foo: <span class="hljs-string">&apos;bar&apos;</span>
  },
  bubbles: <span class="hljs-literal">true</span>,
  cancelable: <span class="hljs-literal">false</span>
});

el.addEventListener(<span class="hljs-string">&apos;myevent&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">event</span>) </span>{
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;Hello &apos;</span> + event.detail.foo);
});

el.dispatchEvent(myEvent);
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E5F;&#x8BF4;&#x660E;&#xFF0C;CustomEvent &#x7684;&#x4E8B;&#x4EF6;&#x5B9E;&#x4F8B;&#xFF0C;&#x9664;&#x4E86;&#x5177;&#x6709; Event &#x63A5;&#x53E3;&#x7684;&#x5B9E;&#x4F8B;&#x5C5E;&#x6027;&#xFF0C;&#x8FD8;&#x5177;&#x6709;<code>detail</code>&#x5C5E;&#x6027;&#x3002;</p>




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